{"id":1239,"date":"2026-02-17T18:08:51","date_gmt":"2026-02-17T18:08:51","guid":{"rendered":"https:\/\/gaeatech.com\/wordpress\/?p=1239"},"modified":"2026-03-26T04:41:54","modified_gmt":"2026-03-26T04:41:54","slug":"constant-head-permeability-astm-d2434-gaea-gdms","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/constant-head-permeability-astm-d2434-gaea-gdms\/","title":{"rendered":"How Do I Create a Constant Head Permeability Test (ASTM D2434) in GDMS?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Measuring the hydraulic conductivity of granular soils is essential for assessing seepage, drainage, and foundation stability. The&nbsp;<strong><a href=\"https:\/\/www.gaeatech.com\/gdms.php\">Geotechnical Data Management System (GDMS)<\/a><\/strong>&nbsp;by&nbsp;GAEA Technologies&nbsp;streamlines the&nbsp;Constant Head Permeability (ASTM D2434)&nbsp;workflow, transforming raw laboratory measurements into professional, auditable reports.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-by-step-guide-to-creating-the-test-in-gdms\">Step-by-Step Guide to Creating the Test in GDMS<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-1-initialize-the-test-in-the-project\">1. Initialize the Test in the Project<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Access your project within the&nbsp;<a href=\"https:\/\/www.gaeatech.com\/gaeasynergy.php\">GaeaSynergy<\/a>&nbsp;platform and locate the specific&nbsp;Sample&nbsp;associated with the soil specimen.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Navigate to the&nbsp;Geotechnical Tests&nbsp;tab.<\/li>\n\n\n\n<li>Select &nbsp;Constant Head Permeability&nbsp;from the dropdown list.<\/li>\n\n\n\n<li>Click on the Add button.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"740\" height=\"615\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-46.png\" alt=\"\" class=\"wp-image-1243\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-46.png 740w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-46-300x249.png 300w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">2. Select the Template<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The geotechnical template determines the format and layout for the test results.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"568\" height=\"520\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-47.png\" alt=\"\" class=\"wp-image-1244\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-47.png 568w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-47-300x275.png 300w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">3. Enter the Test Information<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Enter critical metadata, including the&nbsp;test personnel,&nbsp;verifier, and links to&nbsp;photos&nbsp;of the test specimens if available.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"564\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-48.png\" alt=\"\" class=\"wp-image-1245\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-48.png 880w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-48-300x192.png 300w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-48-768x492.png 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-4-define-sample-and-apparatus-parameters\">4. Define Sample and Apparatus Parameters<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Before entering flow data, you must define the physical constraints of the test as required by&nbsp;<a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.astm.org\/d2434-22.html\">ASTM D2434<\/a>:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"564\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-49.png\" alt=\"\" class=\"wp-image-1246\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-49.png 880w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-49-300x192.png 300w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-49-768x492.png 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dimensions:<\/strong>&nbsp;Enter the inside diameter and length of the soil specimen.<\/li>\n\n\n\n<li><strong>Soil Properties:<\/strong>&nbsp;Input the dry mass and specific gravity of the soil sample to allow the software to calculate the&nbsp;void ratio&nbsp;and&nbsp;dry density.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-5-input-laboratory-observations\">5. Input Laboratory Observations<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">GDMS provides a structured data entry sheet for the three to four test runs typically required to verify laminar flow:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Head Difference:<\/strong>&nbsp;Record the constant water level difference between the manometers.<\/li>\n\n\n\n<li><strong>Discharge &amp; Time:<\/strong>&nbsp;Enter the volume of water collected and the elapsed time for each run.<\/li>\n\n\n\n<li><strong>Temperature:<\/strong>&nbsp;Record the water temperature so GDMS can automatically apply the&nbsp;viscosity correction factor&nbsp;to standardize results to&nbsp;<img decoding=\"async\" src=\"blob:https:\/\/gaeatech.com\/635c6923-e5e2-4da4-ab6c-f451b8761596\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><\/semantics><\/math>.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"564\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-50.png\" alt=\"\" class=\"wp-image-1247\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-50.png 880w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-50-300x192.png 300w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/02\/image-50-768x492.png 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-6-automatic-calculation-and-validation\">6. Automatic Calculation and Validation<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><\/semantics><\/math>The software automatically averages multiple runs and flags any inconsistent data that might indicate turbulent flow or &#8220;bridging&#8221;.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-7-generate-professional-reports\">7. Generate Professional Reports<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Utilize the&nbsp;Automated Reporting&nbsp;engine to finalize your results:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Templates:<\/strong>&nbsp;Choose from predefined ASTM-compliant templates or customize your own.<\/li>\n\n\n\n<li><strong>Attachments:<\/strong>&nbsp;Link photos of the permeameter setup or the soil specimen directly to the report.<\/li>\n\n\n\n<li><strong>Export:<\/strong>&nbsp;Generate a high-resolution PDF for immediate client delivery or integration into a larger&nbsp;<a href=\"https:\/\/gaeatech.com\/knowledge-center\/?p=1130\" target=\"_blank\" rel=\"noreferrer noopener\">geotechnical report<\/a>.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-summary\">Summary<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Performing a Constant Head Permeability test in GAEA Technologies GDMS involves initializing the test under a specific sample, entering apparatus dimensions and soil properties, and recording multiple flow-time observations. The system automatically calculates the corrected permeability and generates standardized reports, significantly reducing the manual effort of geotechnical data management.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-35f06ea7 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.gaeatech.com\/gdms.php\">Learn more about GDMS<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-related-articles\">Related Articles<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/gdms-geotechnical-tests-data-entry-reporting-storage\/\">Entering, Reporting, and Storing Geotechnical Tests in GDMS: A Complete Workflow Tutorial<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/how-to-use-project-views-gaea-gdms-geotechnical-tables-charts\/\">How Can I Use Project Views in GDMS to Display Geotechnical Test Tables and Charts?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/create-proctor-compaction-test-gaea-gdms\/\">How Do I Create a Proctor Compaction Test (ASTM D698\/D1557) in GDMS?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/create-atterberg-limits-test-gaea-gdms\/\">How Can I Create an Atterberg Limits (ASTM D2487) Test in GDMS?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/how-to-create-sieve-analysis-gaea-gdms\/\">How Can I Perform a Sieve Analysis Using GDMS?<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Measuring the hydraulic conductivity of granular soils is essential for assessing seepage, drainage, and foundation stability. The&nbsp;Geotechnical Data Management System (GDMS)&nbsp;by&nbsp;GAEA Technologies&nbsp;streamlines the&nbsp;Constant Head Permeability (ASTM D2434)&nbsp;workflow, transforming raw laboratory measurements into professional, auditable reports. Step-by-Step Guide to Creating the Test in GDMS 1. Initialize the Test in the Project Access your project within the&nbsp;GaeaSynergy&nbsp;platform [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":91233,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1194,726],"tags":[603,601,604,192,436,194,602,320],"class_list":["post-1239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geotechnical-data-management-tutorials","category-training-and-tutorials","tag-astm-d2434","tag-constant-head-permeability","tag-darcys-law","tag-gaea-technologies","tag-gdms","tag-geotechnical-software","tag-hydraulic-conductivity","tag-soil-testing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>GAEA Technologies GDMS Constant Head Permeability Overview - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Learn how to create and report ASTM D2434 Constant Head Permeability tests using GAEA Technologies GDMS. 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